exam Maths Puzzle Numerical Ability

Find the equation for the asymtopes of the hyperbola x^2/9 - y^2/81 = 1

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exam Other Question

Solve by the elimination method.
9x + 3y = -39
4x - 3y = -26

Will someone help me with this one please?
Use the properties for radicals to simplify each of the following expressions. Assume that all variables represent positive real numbers.

√12x^3 /5



THis is my radical symbol √